All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
First of all, we ask Allaah to facilitate your matter and make a way out to your difficulty and hardship as well as the hardship of all the Muslims.
As regards your question, if a woman is observing a waiting period from a revocable divorce then she is still considered as a wife (of her husband), and it is permissible for her husband to take her back without a new contract. The text messages which contained the words of divorce or words of taking you back are considered among the metaphors which need intention.
Similarly, the wording that is mentioned in the question "my wife", is considered among the metaphors for taking you back, therefore, if your husband intended to take you back by saying so, then it is a valid taking back as long as you are still in your waiting period. Therefore, this depends on the husband, if his intention is not known, then in principle you are not taken back (to be his wife).
However, if we presume that the husband did not take his wife back, and he died while she is still in her waiting period from a revocable divorce, then in this case, she moves from observing a waiting period from divorce, to observing a waiting period of a woman whose husband has died because a wife who is still in her waiting period from a revocable divorce is considered a wife, so her husband may divorce her again if he so wishes and she is entitled to inherit him if he dies.
Allaah Knows best.